arm/mach-shmobile/suspend.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Suspend-to-RAM support code for SH-Mobile ARM
0004  *
0005  *  Copyright (C) 2011 Magnus Damm
0006  */
0007
0008 #include <linux/pm.h>
0009 #include <linux/suspend.h>
0010 #include <linux/module.h>
0011 #include <linux/err.h>
0012 #include <linux/cpu.h>
0013
0014 #include <asm/io.h>
0015 #include <asm/system_misc.h>
0016
0017 #include "common.h"
0018
0019 static int shmobile_suspend_default_enter(suspend_state_t suspend_state)
0020 {
0021     cpu_do_idle();
0022     return 0;
0023 }
0024
0025 static int shmobile_suspend_begin(suspend_state_t state)
0026 {
0027     cpu_idle_poll_ctrl(true);
0028     return 0;
0029 }
0030
0031 static void shmobile_suspend_end(void)
0032 {
0033     cpu_idle_poll_ctrl(false);
0034 }
0035
0036 struct platform_suspend_ops shmobile_suspend_ops = {
0037     .begin      = shmobile_suspend_begin,
0038     .end        = shmobile_suspend_end,
0039     .enter      = shmobile_suspend_default_enter,
0040     .valid      = suspend_valid_only_mem,
0041 };
0042
0043 int __init shmobile_suspend_init(void)
0044 {
0045     suspend_set_ops(&shmobile_suspend_ops);
0046     return 0;
0047 }